Pull-socket for electric lamps.



P. BARR. PULL SOCKET FOR ELECTRIC LAMPS. APPLICATION FILED AUG. 12, 1910. RENEWED APR. 25, mil.

Patented Feb. 18, 1913.

UNITED STATES PATENT OFFICE.

' rnnnnnrc BARR, or BROOKLYN, new YORK.

PULL-SOCKET FOR ELECTRIC LAMPS.

-T dllivhom it may concern:

Beit known that I, Fnnnenro BARR, a citiaen of the United States, residing at 362 Livlngston street, Brooklyn, county of Kings, and -State of New York, have infventedi certain new and useful Improve merits in'Pull-Sockets for Electric Lamps, fully'fldescribedl and represented in-the foll u o u low ng. spec fication. and the accompanying drawings, forming a part of the same.

invention relates to electric lam'mand switch sockets and particularly a I pull lswitch for. an electric lamp-socket, in

t rat aeadrslt o p rcelaia rvothe iaa l tin whichja cord or chain is connected to a segnent iin the switch and extended throughin eyelet in the outer shell to be pulled when shifting the'switch, and the invention consists.ipri'marily in forming the insulatingbed; and headpiece of the switch with cylindrical, flanges "adapted to surround and inclose ma greater or less degree the switch- Inechan'i'sin, so as to prevent any short-circuitingbetween'the parts of such mechanisiii.' 1 R The invention also includes various details of construction.

. Heretofore, it has been common to make a. switchbody with a base andhead-piece of porcelain connected by posts, with aratchetmechanism, for turning the switch-contacts,

mounted upon a spindle journaled in said base and head-piece,- and the present invention furnishes a construction in which the baseand head-piece may be connected withoutthe useof posts, by'the cylindrical flanges formed upon them to inclose all ofthe switch-mechanismexcept the pull-chain. Heretofore, the eyelet upon the shell has beenthe only means of supporting the chainsuch contacts insulated thereon, but not protected in, anyway from contact with the chainin case thechain becomes slackened. In the 'resent construction, I form the Specification of Letters Patent.

v Patented Feb. 18,'1913. A pp'l ication filed August 12, 1910, Serial No. 576,850. Renewed. April 25, 1911. Serial No. 623,172.

material with a marginal depending flange which nearly incloses the switch-leaves, and

forms an inner Wall to the said channel. I

herein, the base having the cylindrical flange to support the chain as described above, and the ratchet-disk being flanged.

In the drawing, Figure l is a vertical sec tion at line 1-1 in Fig. 2 where hatched, of a switch constructed without posts; Fig. 2' shows the top of the head-piece with the chain-connections in dotted lines; Fig. 3 shows the under side of the base; Fig. 4 shows the base and head-piece in elevation with the mechanism that is visible between those parts; Fig. 5 is a perspective view of the head-piece; Fig.- 6 is a perspective view of the base and insulating sleeve below the same; Fig. 7 is a plan of the base; Fig. 8 is an elevation of the lamp-socket complete with the eyelet in section; Fig. 9 shows-in perspective the top of the rotating disk; Fig. 9 is a section of an alternative form for the disk t; Fig. 10 shows in perspective the bottom of the rotatingdisk with the spring-leaves thereon; Fig. 11 shows the under side of .the ratchet-segment with its attached spin'dle andthe chain and eyelet;

Fig. 12 is an elevation of the switch with two posts connecting the base and head piece, onejof the posts bcingbrok'en OE and the base shown in section at the center line where hatched; Fig. 13 is a plan of the base shown in Fig. 12 with the posts m thereon; -Fig. 14 represents the under side of the headpiece shown in Fig. 12 with the upper ends of the posts as, and Fig. -15 represents the spindle in elevation in either form of switch.

In Figs. .1 to 11 inclusive, the base a is of insulating material in disk-form with the following integral attachments, namely,

the boss I) in the center,'segmental jseats c I opposite side of, the switiih-inechanism is in? closed by a correspondingcylindrical flange, f dean thaws-Pieces, as she ele Fisk- 133 .A rota-ry Spindle 0 is'fitted to bushings 0' 4, the space between the top of the flange e and the head-piece g forming a segmental slot 'g which is provided for the movement of the-chain and the ratchet-segment. Depressions are formed inside of flange 6' upon the base, to receive connection-blocks h, h, which are secured by screws 2 2" extended upwardly through the bottom of the base. as shown in Figs. 1 and 7. The screw 2' of the block 71 is in connection with the screwshell f of the lamp-socket, see Figs. 1 and 3. Recesses 7: are formed in the top of the head-piece, and circuit terminals Z are secured therein by screws Z which are extended downward through holes in the flange f and screwed into threaded holes m in the blocks 72., 71 thus holding the headpiece firmly upon the base without any posts. the circuit terminals Z within lateral extensions of the recess-es k, with binding-screws n. therein to secure the usual circuit wiring (not shown) These lugs lie within the circle of the head-piece and are covered with an insulating sleeve 12, as shown in Fig. 2.

and j) in the base and head-piece, the latter seats cand (Z.

being held from turning by a square flange, as indicated by the square socket B therefor in Fig. 14. The usualspiral spring p is applied to the spindle and its ends attached to the bushing 79 and the ratchetsegment, as indicated in Fig. 1., and by the dotted lines in Fig. 11. A ratchet-disk having four downwardly sloping teeth Q is attached to the spindle and provided with an integral segment 9' to which one end of the chain 7" is attached by a bent lug r. The chain has the usual knob 8 upon its outer end, and before it isattached to the segment an eyelet s is slipped upon the chain and thus held thereon. A disk 73 of insulating material with downwardly depending marginal flange 1" is fitted loosely to the spindle, and formed with four ratchetnotches u in the upper side to engage the downwardly projecting ratchet-teeth q. In the recess within the flange t, a hub u is formed, and a circular plate 'v is formed to fit withinthe flange and around the hub.

The hub is preferably made square, as

shown in Fig. 10, to turn the plate '0 thereby. The plate 2) has-contact leafsprings o sloped downwardly therefrom to engage metallic spring-contacts or, which are supported upon the base between the segmental One of the springcontacts w is connected with the center lamp-contact j by screw 6 beneath the base, as shown in Fig. 12,and the other is connected by its blockfh' and screw Z with one of the circuit terminals upon the head-piece. The outer metallic shell A is formed with the usual notch. B to receive the eyelet s', which is shown in section in Figs. and 8; and a Vertical lugs 12?. are provided upon chain to the flange 6 upon the base a, the

chain resting upon'the topo-f such flange, and themargin of the disk t lying close to the inner side of the channel, so as to form an insulating wall within the same. The chain is thus confined positively to the channel, and cannot contact with any parts of the switch. The depending flanges 25 upon the rotary disk 1 wholly incloses the plate 1) and its attached leaf-springs and prevents any part oi the chain from contacting'with them. Observation of Fig. 4 shows that the semi-cylindrical flange f which is of insulating material integral with the headpiece, takes the place of posts in connecting the head-piece with the base, and that the flanges e and 7' serve to wholly inclose all of the switch-mechanism except at the semicircular slot 9 (see right hand side of Fig. at) through which the disk t is. visible, and in which the chain operates. The same advantages-in respect to the insulation of the v chain are secured in the construction shown in Figs. 12, 13 and 11, where the head-piece is supported upon the base by two posts a: set 90 degrees apart, and the movementof the segment is restricted by two integral studs 71 which project downward from the head-piece over the semi cylindrical flange 0 upon the base. Inthis construction. as shown in Figs. 12 and 13, the flange c embraces three-quarters of the circle, and incloses all of the switch-mechanism excepting at the posts, and it forms a ledge which supports the chain the same as the flange e in Fig. *1. One of the contacts w is fastened to the base by a screw 5 Fig.14c shows the head-piece for this construction, with all attachments removed exceptthe posts a the notches E being shown in the under side of the head-piece to re-.

the chain then secured to the segment 9, the l removal of the head-piece from the base then permitting the segment qt with the attached spindle 0, and. the chain and eyelet to be removed from the casing together. It will be understood-that in the form shown the,

spindle is attached rigidly to the ratchetdisk and segment so as to oscillate therewith under the 'alternatingoperation of the ,not essential. 'celain or insulating disk t has the ratchet spring p and the pull-chain a" but this is It will be noted't'hat the pornotches u formed directly in its upper side to receive the ratchet-teeth 9; but the notches may be formed in a metal plate 25 sunk in the upper side of the porcelain disk t, if de sired, as shown in Fig. 9, a square hub 23 9 also shows an alternative construction for the plate '0 in which it is propelled by studs 0 extended into the body of the disk, in

which case around hub would'be used in place of the square hub u.

Having thus set forth the nature of the invention what is claimed herein is:

1. A pull-switch for a lampsocket having a base and headpiece with a spindle and switch-mechanism located betwen the same and a ratchet-segment with chain extended therefrom and a cylindrical flange integral with the base extended around such mechanism to the level of the pull-chain, to form a channel beneath the head-piece with a ledge aninsulating disk with its edge forming a wall at the inner side of such channel.

3. A pull-switch for a lamp-socket hav ing a base and head-piecawith a spindle and switch-mechanism located between the same and a ratchet-segment with chain extended therefrom at. one side of the switch, and cylindrical-flanges projected upwardly and downwardly from the base and head-piece ..-at opposite sides of -the switch-mechanism, "inclosing all of the same excepting the ratchet-segment.

4. In a pull socket switch, an insulating block formed of two parts having a narrow chain guiding and insulating groove open around one side between the parts, switch contacts mounted within the block, an oscil lating lever pivoted within the block and having its outer end projecting into said groove and an operating chain secured tothe outer end of said lever, and guided in said groove and thereby kept from engagement with said contacts.

5. A pull-switch for a lamp-socket havinga base and head-piece with a spindle and switch-mechanism located between the same and a ratchet-segment with chain extended therefrom at one side of the switch, and cylindrical flanges projected upwardly and downwardly from'the base and head-piece at opposite sides of the switch-mechanism, the head-piece having notches therein with contact-blocks Z provided. with bindingscrews n, connectiou-blocks h and h sunk in the base and secured by screws from the bottom of the same, screws. Z extended from the contact-blocks Z downward through the cylindrical flange into the blocks 11., h, and switch-mechanism connected by the blocks h, h, substantially as set forth.

6. In a pull-switch for a lamp-socket, the combination, with a movable spindle having a ratchet-disk attached thereto with ratchetscgment projected therefrom and a pullchain attached thereto, of the insulating-disk t fitted'movably to the spindle and provided with the ratchet-notches u and having on the under side the marginal flange t and the and provided upon its upper side with ratchet-teeth u and having upon its lower side a marginal flange t with a plate '0 secured therein .and provided with contact leaf-springs e" and spring-contacts 10 upon the base for connection by the leaf-springs '0, one of such spring-contacts being connected with the center lamp-contact j and the other connected with one of the binding-screws 8. In a pull-switch for a lamp-socket, the combination, with a'movable spindle having a ratchet-disk attached thereto with ratchet- ,segme'nts projected therefrom and a'pullchain attached thereto, of the insulatingdisk 6 fitted movably to the spindle and provided upon the top with the square hub t, and a plate t titted thereto and provided with ratchet-teeth, and the insulating-disk having upon the under side the marginal flange t with the metallic plate '0 secured within such flange and provided with leaf- -springs 11 for connecting the contacts of the switch whensuitably operated by the pullchain.

9. In a pull socket, the combination of a base member and a head member, one of said members having a flange projecting to meet the other member and forming a recess between said members for the switch mechanism, plates located between said flange'and the opposite member each of said plates having screw threaded openings and screws passing through said flange into said plates and through the opposite member into meet the other said gether.

10. In a lamp socket switch, a base member-and a head member, said members having flanges projecting to form a recess between said members, two switch contacts located oppositeeach other in said recess, a lamp terminal connected to one of said contacts, two circuit terminals, one of said circuit terminals bemgconnected to the other switch contact and a. second lamp terminal connected to the other circuit terminal and a rotatable switch member for connecting said switch contacts. Y

.11. In a pull switch, an insulating block formed in two parts, one oi. said parts having a flange around one-halt extending to art, screws passing through the flanged portion for securing the parts together, said flanged portion. having recesses inits outer and side walls, circuit terminals secured in said recesses by means of said screws and switch mechanism located between the parts of said insulating member.

12.- In a lamp socket, an insulating block formed in two parts, one of said parts having'a flange projecting toward and meeting the other part, said flanged member having recesses in its flanged portion, circuit terminals located in said recesses, amp terminals on the opposite face of the other part of the insulating block, plates located between the flange of one part and the adjacent face of the other part, screws passing thro-ughthe.

flange of said first mentioned part and securing the circuit terminals and said part to said plates and screws passing through the other part and securing said plates, one of said latter screws also securing one of the lamp terminals to said part and switch mechanism located between the parts of said insulating block.

.13. In a pull switch, an insulating block formed in two parts, one of said parts having a flangeextendilog around 'one side and projected to meet the other part, said latter part having a flange extending around the opposite side and projecting towardthe. first mentirined part but leaving a channel around said side and switch mechanism locate-d between said parts and including an operating lever and chain operable in said channel and means for securing said parts together.

14. In a lamp socket switch, an insulating block formed in two parts, one of said parts plates for securing the members tocuit terminals mounted onthe part adapted to accommodate the same, lamp terminals mounted on the part adapted to accommodate the same, switch contacts mounted on the part adapted to accommodate the same, plates secured between said parts, two

screws passing through one part and securing the circuit terminals to said part and securing said part and said circuit terminals to said plates, two screws passing through the other part, one of said latter screws securing the lamp terminal to said part and screwing into one of said plates, the other screw passing through the other part and through one of the switch contacts and securing said part and one of said switch contacts to the other plate and a third screw securing the other lamp terminal and the other switch contact to said part.

. 15. In a pull socket switch, an insulating block, switch contacts contained therein, a

spindle supported in said block, an oscillat mg lever on said spindle, an operating chain secured to the outer end ot said lever, said block having a segmental annular groove open around one side and a curved insulat-i ing member forming the inner wall of saidv switch contacts and separating said oscillating lever "from said switch contacts and preventing said chain from engaging said contacts.

In testimony whereof I have hereunto set my hand in the presence ot two subscribing witnesses.

FREDERIC BARR.

*Witnesses:

liJ. IJEE, THOMAS S. CRANE. 

